The celebration that followed Jack's promotion to Major led to his being busted back to 2nd Lieutenant for multiple infractions (using a Jeep without permission, trying to outrun the Military Police, one of the fellow partiers took a swing at an MP...) He remained in command of the squadron, however, and his claim to fame...or infamy... (as he was fond of saying) is he was the only 2nd Lieutenant to ever lead a Combat Squadron during the war. He soon returned to the rank of Captain however, as Gen. Doolittle, now in command of the 8th Air Force, was once again persuaded to overlook the infractions by 20th Fighter Group C.O., Colonel Cy Wilson.
If I am not mistaken Jack was officially credited with three locomotives, the last one being on the day he was shot down, June 12, 1944. He evaded back to Allied held territory, but that is another story...